Note 15 - Strategic Partnership Agreement With Advantest and Related Party Transactions (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2020	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer, Including Assessed Tax		$ 219,024	$ 179,465	$ 165,835
Contract with Customer, Liability		20,306	26,517
Analytics [Member]
Revenue from Contract with Customer, Including Assessed Tax			0	0
Advantest [Member] | Strategic Partnership [Member]
Stock Issued During Period, Shares, New Issues (in shares)	3,306,924
Proceeds from Issuance of Common Stock	$ 65,200
Long-Term Purchase Commitment, Period (Year)	5 years
Advantest [Member] | Strategic Partnership [Member] | Analytics [Member]
Revenue from Contract with Customer, Including Assessed Tax		8,800	12,700	$ 9,000
Contract with Customer, Liability		$ 700	$ 8,300